I'm no expert at this and I've probably read the same care sheets you have. But last year I saw my KSB pair copulating from February thru May. She had 6 babies in September. So I really don't know when the mating took. I've heard it could be from 4-8 months. Perhaps someone with more knowledge will post.
I won't get any babies this year becuase my only adult male got away and a cat ate him
and I only have the one adult female. But next year all 10 of my KSBs will be able to breed. Wohoo I can't wait. I have anerys who are possible het paradox snow and normals.